XVI International Botanical Congess

One of the approaches for ecological study of plant diversity - the comparative reproduction analysis in nature and introduction conditions. As a model systems, the rear and vanishing species of Campanulaceae were chosen: Platycodon grandiflorus A. DC., Campanula carpatica Jacq, Gadellia lactiflora (Bieb). P.grandiflorus can be found in Russia (Eastern Siberia and Far East), G.lactiflora and C.carpatica - in the Caucases. P.grandiflorus (a decorative plant) does not propagate by the seeds in situ and poorly - in vivo. G. lactiflora and C. carpatica have a high seed productivity in the introduction conditions (Botanical Garden, St. Petersburg). We have revealed the embryological features both common of Campanulaceae (anatroupous unitegmic ovule, Polygonum-type of the embryo sac development etc.) and species-specific ones. Real and potential seed productivity in investigated species was estimated. The data obtained could be useful for Campanulaceae systematics and elaboration of their micropropagation.